The JCA366 USB-C to 4-port HDMI Multi-Monitor Adapter functions as an external video card for your Mac or PC. It gives you the ability to add four additional monitors/displays through your USB-C port. This is the perfect alternative to a costly video card. With the JCA366, you can quickly install the driver with a simple USB-C plug-in. Then connect your device to your monitors using HDMI cables, and you have just created a new visual environment in seconds. With this multi-monitor adapter, you can extend your desktop across multiple displays and clone one screen onto another, in addition to having individual applications displayed on each monitor.